If I had the money, my dream would be to go to some of the places I've never been like hidden gems in Europe. I've heard Croatia is gorgeous! Have you already been to that part of the world? I like that Europe has a wealth of culture and history, and a certain level of sophistication about it. I would also be interested in Australia.
If you have never done a safari, I'd also encourage you to try that if you can afford it. Someone said Africa is not a good place to visit at the moment, I'm not sure what part of Africa they mean because Africa is a
HUGE continent crammed full of many diverse countries. I can only speak for Botswana because it's where I'm from; little known, peaceful and safe Southern African country with stunning safari holiday options
I think everyone should treat themselves to at least one safari holiday in their lifetime, if they can afford it.